Safety locking device for windows



Sept. 1, 1970 E. F. HIRSCHLER SAFETY LOCKING DEVICE FOR WINDOWS Filed Aug. 31, 1967 i l/III :III

INVENTOR. 2 WM [-7 MESCHL ER [/o/vez. L/ 7EFF7' l/rfarzh zy United States Patent Oflice 3,526,421 SAFETY LOCKING DEVICE FOR WINDOWS Elvin F. Hirschler, San Beruardino, Calif. (27522 28th St., Highland, Calif. 92346) Filed Aug. 31, 1967, Ser. No. 664,668 Int. Cl. Ec 1/10 US. Cl. 292-42 5 Claims ABSTRACT OF THE DISCLOSURE Apparatus for safely locking sliding windows and the like including a block on the lower sash having lock bolts entering the side sash and the upper window and a locking means connecting the bolts for holding the window against unauthorized entry.

This invention relates to window safety locking mechanism.

One of the main objects of the invention is to provide safety locking mechanism for sliding windows that prevents unauthorized entry.

Another object of the invention is in the provision of window locking mechanism that covers attachment devices and securely connects locking bolts for frame and sash.

Still another object of the invention is to provide a combined frame and window sash locking mechanism that is secured against unauthorized entry.

Yet another object of the invention is in the provision of 'a dual bolt adjustable connection for frame and sash that can be connected in a fixed manner to prevent manual manipulation from outside.

A still further object of the invention is to provide a safety window lock secure against outside manipulation so that the sashes of a double window may be opened partially to permit satisfactory draft.

Conventional window latching devices do not provide a high degree of safety against unauthorized entry. Applicant provides an easily operated single unit safety device that locks a lower window to the frame and at the same time secures the lower window to the sash of the upper window, the two locking devices being bolted together in a manner to prevent outside manipulation. The device is so arranged as to cover window attachment screws when in operative locked position.

Generally, the device includes a spring tensioned manually releasable bolt adapted to engage a receiving slot in the frame through an attachment block. A plate on the outer end of the bolt has projecting arms that slide over attachment screws in the block to prevent detachment thereof. A second laterally disposed upper window sash locking bolt is carried in a spring tensioned manner in the attachment block and has a releasable connection with said first bolt. When the frame and sash bolts are in locked position they are fixedly connected by detachable connecting means. The sash bolt may be manually withdrawn and held while the frame bolt is manually withdrawn.

The arrangement of the frame and sash bolts is such that one or both of the sliding windows may be locked in partial open position with the mechanism in such remote and locked together position as to defy manipulation by an intruder.

The invention is particularly adapted to up and down sliding windows but is also adapted for use on lateral sliding windows, sliding patio doors and the like.

These and other objects and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following detailed description of the preferred embodiment thereof, reference being made to the accompanying drawings, herewith, wherein:

3,526,421 Patented Sept. 1, 1970 FIG. 1 is an exploded perspective View of the safety lock mechanism;

FIG. 2 is an elevational view showing the safety lock in double window secured position;

FIG. 3 is a plan view of the locking device of FIG. 2; and

FIG. 4 is a partial sectional View of the frame and sash bolt receiving recesses.

Referring specifically to the drawings, a conventional double type sliding window is shown in FIGS. 2 and 3. A lower window is indicated at 10 and an upper window at 12. The lower window 10 has a sash 14 and the upper window 12 a sash 15. A window frame is identified as 16 having sash guides 18. Any type of window frame could be used. A bolt receiving aperture 20- having a metal gromet 22, if desired, is placed preferably about four or six inches above the lower window at 24. Three similar apertures 26, 27 and 28 are made in the sash 15 of the upper window 12.

The safety latch or locking mechanism includes a preferably rectangular block 30 having an interior opening 32. The block 30 is secured to the top outer end of the upper sash portion of the lower window 10. The attachment is made by plural screw head recessed openings 34 and screws 36. The screw heads lie flush with the upper surface of the block 30. A pair of lock bolt longitudinally disposed receiving sleeves 38 having bolt receiving openings 38a are formed integrally or otherwise on the upper side surfaces of the block 30. A pair of laterally disposed axially aligned bolt receiving openings 40 are formed in the block 30.

A window frame locking bolt is indicated at 42 and this bolt 42 is slideable in the sleeves 38 and into or out of the receiving aperture 20. A spring 44 surrounds the bolt 42 between the sleeves 38 and is secured in operative position by the cotter key 46 and hole 48 in bolt 42. The mechanism so far descrbied is somewhat like conventional sash and frame latching devices but applicant desires a more complete and effective safety lock mechanism. The outer end of the frame locking bolt 42 is secured to an outer vertically disposed plate 50 that extends above and below the bolt. A pair of flat arms 52 are attached to and extend inwardly from the plate 50. The arms 52 are adapted to slide over and prevent access to the attachment screws 36 as shown in FIG. 2. A pair of ears or projections 54 on the arms 52 are apertured at 56 for reasons later to be described. It is obvious that the plate 50 and locking bolt 42 are held in a tensioned position that can be overcome by manual withdrawal of the plate and bolt.

A second upper sash and window locking bolt is indicated at 58. The bolt 58 is slideable in the block openings 40. The bolt 58 has an enlarged outer end or butt 60 which in turn has an inwardly projecting neck 62 apertured at 64. It will be noted that the base of the neck 62 is raised from the bolt 58 a sufficient distance to ride over one of the fiat arms 52 when forced to a sash locking and frame bolt securing position. The bolt 58 and butt 60 are held in tensioned sash locking position by means of a spring 66 surrounding the bolt 58 within the block interior 32 and secured by the cotter key 68 and bolt hole 70. When the bolts 42 and 58 are in frame and sash locking position, the apertured neck 62 lies immediately adjacent the apertured ears 54 so that they may be fixedly attached by a threaded bolt 72 which preferably has a safety securing nut 74. It Will be noted that upon withdrawal of the bolt 72, the neck 60 and bolt 58 may be manually moved rearwardly to an unlocked position with respect to the sash and frame bolt 42 and the neck 62 twisted laterally so that the face 76 of the neck will engage the outer face 78 of the block 30 and be held in that position until manually released.

The operation of the device is relatively simple. It is particularly desired to provide a preferably sliding type double window with a safety locking mechanism that will prevent unauthorized entry. It is desired to safety lock the frame and sash in down position and also lock the windows in partial open position for air draft purposes at night. The theory is to make the lock so safe and inaccessible that only the breaking of the glass would permit entry. The locking of the frame will place the flat arms over the attachment screw heads. The frame and sash locking bolts are secured by bolting the arm ears to the apertured neck. It would be almost impossible for an intruder to reach an arm through the night openings to release the lock. If it is desired that both windows be opened slightly, the sash locking bolt is secured in the upper sash slot. Except when the safety locking mechanism is in position, the windows may be raised and lowered as desired.

While I have described in considerable detail what I believe to be the preferred form of my invention, it will be understood by those skilled in the art that various changes may be made in the shape and arrangement of the several parts without departing from the broad scope of my invention.

I claim:

'1. Safety mechanism for sliding windows, comprising:

a block attached to the top side of the upper sash of a lower window;

said block having longitudinal and lateral bolt receiving openings;

bolt receiving apertures in the window frame and upper window sash;

a locked bolt slidable in said longitudinal openings and adapted to engage a'frame aperture;

a lock bolt slidable in said lateral bolt openings adapted to engage an upper sash aperture; and

cooperating mechanism on the outer ends of said bolts adapted to engage and be locked together in a manner to prevent unauthorized entry;

said bolts being spring tensioned toward locking position whereby the lateral bolt, when unlocked, may be withdrawn and held against the block while the frame locking longitudinal bolt is manually withdrawn; and

a plate on the end of the frame locking bolt having arms sliding over the attachment block and protecting the same against detachment.

2. A device as set forth in claim 1 in which a joint bolt locking means is disposed on the arms and on the end of the sash bolt whereby they may be connected by a bolt or suitable securing means.

3. A device as set forth in claim 2 in which a threaded bolt and self locking nut is used in the bolt locking means.

4. A device as set forth in claim 3 in which multiple attachment screws for said block are adapted to be safely covered by said arms.

5. A device as set forth in claim 4 in which frame bolt sleeves are disposed on the upper face of said block and the interior thereof is open to accommodate the lateral bolt and spring means thereon.

References Cited UNITED STATES PATENTS 463,494 11/1891 De Mars 29237 956,427 4/1910 Roy 29242 1,060,238 4/1913 Elston 2924 1,167,175 1/1916 Hicks 292-42 MARVIN A. CHAMPION, Primary Examiner R. L. WOLFE, Assistant Examiner US. Cl. X.R. 292l50 

